TECHNICAL ASSISTANCE SERVICE
46
CAUSE
FAULT
SOLUTION
Burner dirty.
Insufficient air/fuel flow to burner.
Boiler settings.
The boiler does not reach its
temperature set point.
Clean the combustion chamber.
Check and adjust the burner.
Check correct functioning.
Check temperature setting.
No water supply.
Boiler settings.
Burner locks out.
Check the vent and bleed valves.
Check CH circuit pressure.
Check correct functioning.
Check temperature setting.
Check electrical wiring.
Check positioning of sensors.
Air in the circuit.
Pump malfunctioning.
Boiler reaches set
temperature but radiators are
still cold.
Bleed the circuit.
Unseize the pump.
Change the pump.
Check pump electrical
connections.
Pump malfunctioning.
Pump does not start.
Unseize the pump.
Change the pump.
Check pump electrical
connections.
Problem with CH circuit
expansion vessel.
Circuit pressure too high.
Problem with CH circuit safety
valve.
The safety valve keeps
opening.
Check efficiency of expansion
vessel.
Check circuit pressure.
Check pressure reducer.
Check valve setting and efficiency.
